Device for banding elliptic springs



'(No ModeL) J. HALE.

7 Device for Banding Elliptic Springs.

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' Patented April 26,1881.

UNITED STAT S PATENT OFFICE.

JAMES HALE, OF DETROIT, MICHIGAN.

DEl/ICE FOR BANDING II-ELLIPTIC SPRYINGS.

SPEOIF ICATION fOnniLg part Of Letters Patent NO. 240,700, da'.ted April 26, 1881.

Application filed January 25, 1881. (No model.)

To all whmiz it may concern Be it known that I, JAMES HALE, of Detroit, Wayne county, Michigan, have invented an Improvementiu Devices for Banding Elliptic Springs, of which the following is a specifi.ca-,

tion.

The nature of my invention relates to an improved method of manufacturing metallic bands} upon a mandrel, and the mechanism necessary for a perfect result.

The object of my invention is toproduce ironbands such as are employed to hold the leaves of elliptic springs in place, and for other purposes where bands are required in large numbers, of any desired size, shape, or form, as more fully hereinafter described.

Figure 1 is a central vertical cross-section, showing the dies in place and as secured to the anvil and head of a steam-hammer. Fig. 2 is a perspective view, showing the inner faces of the upper and lower dies. Fig. 3 is a section of an elliptic car-spring, showing the function performed by the band.

In the accompanying drawings, which form a part of this specification, A represents the anvil and B the head of a steam-hammer, both being recessed to receive the dovetailshaped lugs a b, the former projecting from the lower face of the die G, and the latter projecting from the upper face of the die D, both of said dies being secured by wedges c, driven in such recesses by the side of the lugs. The two halves of thedie shown in the drawings, when in contact, show or present a rectangular opening of the proper size to receive a mandrel, which should fill such opening at its front and rear presentation. The size of the mandrel determines the interior size of the hand, which should be such as to allow it to be easily slipped onto the articleupon which it is designed to be placed. A recess, E, of

the width and thickness of the desired band,

is cut or cast in the inner faces of the dies, and the inner faces or side walls of this recess are slightly beveled to give desired bevel-face to the edge of the band, and to prevent the same from being wedged into the recess.

' In practice the mandrel is inserted resting upon the bearings e, a piece ofiron of the The mandrel and band are then removed and the band removed from the mandrel, which is then ready to be used in formiu g another band,

and so on until the'desired number is obtained.

When it is desired to utilize a band, as shown in Fig. 3, it is slipped on the spring to hold the parts thereof together, the band having been previously heated. The spring now occupies the position of the mandrel, and with the band is inserted in the lower half of the die, the band resting in the recess. The hammer is again put in motion, when the band is rigidly secured in place, its inner faces being compelled to conform to any irregularities of surface upon the spring.

These dies may be made of any form or size to make and secure in place bands upon axles, shafting, and other devices where it is necessary that bands should be rigidly secured.

What I claim as my invention is-- i 1. The method herein described of forming and securing metallic bands, consisting of forging the same upon a m'andrel in dies removably secured to the anvil and head of a steam-hammer, and provided withrecesses of the same shape as the finished band, and by means of the same dies swaging said bands upon the articleto be banded, substantially as set forth.

2. Incombination, with the head and anvil of a steam-hammer, the die consisting of the upper and lower half, 0 D, removably secured to said head and anvil, each die being pro- 7 vided with a recess of the same shape as one, half of the finished band, substantially as aud'for the purposes described. I v

JAMES HALE.

Witnesses:

H. S. SPRAGUE, E. ScULLY, 

